Since 2001 1stdibs has given antique dealers from all over the world a chance to offer their selections in an open marketplace online. Originally specializing in furniture, 1stdibs expanded its categories and started showcasing shops that dealt in fine art, jewelry, watches, and fashion. After 10 years in business, they are expanding from digital to brick and mortar. 1stdibs@NYDC has taken over the 10th floor of the New York Design Center. The 33,000-square-foot gallery houses 54 dealers ranging from industrial to modern furnishings and lighting, with 1,100-square-foot reserved for rotating exhibitions. The gallery is open to the public Monday to Friday from 9am to 6pm and Saturday from 10am to 5pm. Visit the space at 200 Lexington Avenue or peruse the inventory here.